Shoe upper



FIG. 1 is a front perspective view of a shoe upper showing my new design;

FIG. 2 is a rear perspective view thereof; and,

FIG. 3 is a lateral side view thereof.

The broken line showing of the remainder of the shoe upper is for illustrative purposes only and forms no part of the claimed design. The unshown portion of the shoe upper forms no part of the claimed design. 

The ornamental design for a shoe upper, as shown and described. 